Are truffles stored in rice? Because that's what that picture is. (And it's packaged portobello mushrooms just below the rice bin.) Oddly, the PLU code is 9999...I wonder if some wise-ass Safeway employee created this label?

Rice is definitely NOT the medium.Truffles lose a lot of weight by evaporation, in the order of 1% per day.If you lose weight, you lose money. That's why truffles are best kept wrapped in some medium ( usu. paper or cloth ) that will retain a moist environment around each piece.Rice absorbs way too much moisture. Why is it done? Historically ( and still in present times...) some dishonest merchants would sell the rice afterwards as "truffle flavored rice", but that is plain BS: truffle flavors are highly volatile and will disappear at the high temperatures rice is cooked.